JPH0420631Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is based on a carriage that is movably disposed along the rail via guide rollers that roll on a running surface provided in the guide rail. This paper relates to a traveling device for such a drawing machine.

<Prior Art> Conventionally, drawing machines have been used, for example, to move a drawing machine head etc. freely back and forth along a vertical rail via a carriage provided in a vertical rail that is movably assembled to a horizontal rail. There are things you get as you get them.

In this drawing machine, a pair of U-shaped running surfaces are formed on the inner wall of the rail so as to face each other. A plurality of rollers rotatably supported by the carriage are in rolling contact with the running surface independently. By moving the carriage along the rail via the rollers, the drawing head connected to the carriage can move in parallel on the drawing board.

Incidentally, the above-mentioned carriage is subjected to a rotational moment due to the load of the above-mentioned drafting head and the like. Due to this rotational moment, the above roller
The roller comes into pressure contact with the running surface at a slight inclination in the axial direction of the roller. Therefore, the roller and the running surface cannot maintain surface contact at their rolling contact surfaces. and,
Since the roller travels within the rail in a state of local point contact with the running surface, a large load is placed on this point contact portion, resulting in severe wear in this portion. Therefore, play occurs between the running surface and the roller, which hinders accurate and smooth running of the drafting head and reduces the durability of the roller and rail.

Further, in order to eliminate the above-mentioned drawbacks, a device as shown in FIG. 1 is known.

In this traveling device, guide rollers 101,
The rollers 102 are rotatably supported by an integral eccentric shaft 103 so as to overlap in the axial direction of the rollers 101 and 102, respectively. These guide rollers 101 and 102 are in rolling contact with roller running surfaces 105 and 106 formed inside the rail 104, respectively, and the inside of the rail 104 is
It is designed to be able to move freely along lines 05 and 106.

Further, a carriage 107 is disposed between each of the guide rollers 101 and 102, and a drafting head (not shown), for example, is assembled and fixed to this carriage 107. The guide rollers 101 and 102 run within the rails when the drafting head moves.

In this traveling device, the guide roller 101,
102 and the respective running surfaces 105, 106 are the rolling contact surfaces formed by the respective rollers 101, 102.
Since the rollers 101 and 10 have a step in the axial direction, even when a moment is applied to the contact surface due to the load of the drafting head, the rollers 101 and 10
2 and each of the running surfaces 105, 106 can maintain a surface contact state, and each of the rollers 101, 1
02 and each of the running surfaces 105, 106 can be prevented from being worn.

<Problem to be solved by the invention> However, in the traveling device configured as described above, the rollers 101 and 102 are provided in an overlapping state in the axial direction. Carriage 107 between
Since each of the above rollers 1
01 and 102 are provided with their axial height positions greatly apart. Therefore, the running surface 1 on which the rollers 101 and 102 contact each other
05 and 106 must also be formed at beveled positions on opposite sides of the rail in correspondence with these rollers 101 and 102, respectively. Therefore, forming parallel running surfaces 105 and 106 with high precision at a position having such a step difference is as follows:
It was becoming very difficult.

Further, as described above, each of the rollers 101, 1
02 are provided one on top of the other, and each of these rollers 10
Since the carriage 107 is disposed between the rollers 101 and 102, the roller storage portion within the rail becomes large in the axial direction of each of the rollers 101 and 102. Therefore, when designing the above-mentioned rail, there are restrictions on the space for arranging a running path for balance weights, etc. within the rail, and there is also the disadvantage that the degree of freedom in design is reduced. It was hot.

Furthermore, if the height dimension of the roller storage section increases, the mounting position of the drafting head connected to this carriage will also become higher. For this reason, the entire drafting head is set high, and the drafting head must be operated at a position far from the drafting surface during drafting, resulting in poor operability of the drafting head.

Further, in the traveling device, each of the rollers 101,
102 are integrally connected by an eccentric shaft 103. Therefore, if one of the rollers 101 is adjusted when the rollers 101, 102 are brought into pressure contact with the running surfaces 105, 106, the operation will be interrupted. Correspondingly, a slight shift occurs in the other roller 102. Therefore, in a traveling device having such integrally connected rollers 101 and 102, adjustment thereof has become complicated.

The present invention was proposed in view of the above-mentioned circumstances, and is capable of reducing wear on guide rollers and rails, has excellent durability, and ensures accurate and smooth movement of moving members such as drafting heads and vertical rails at all times. To provide a traveling device for a drafting machine which is capable of performing a moving operation, is easy to adjust, is easy to manufacture, and can have a large degree of freedom in designing a guide rail. The purpose is to

<Means for Solving the Problems> In other words, in order to achieve the above-mentioned problems, the traveling device of the present invention includes a carriage disposed within the rail,
The carriage has a plurality of guide rollers that are rotatably supported by the carriage and independently roll into contact with mutually opposing running surfaces of the rail, wherein the carriage has a first horizontal surface that is bent into a crank shape and a first horizontal surface that is bent into a crank shape. The guide roller consists of a first guide roller rotatably supported on the front side of the first horizontal part, and a first guide roller rotatably supported on the back side of the second horizontal part. At least one pair of pivotally supported second guide rollers is provided, one of the pair of first and second guide rollers is movable in the radial direction and the other is fixed so as not to be movable in the radial direction. One axial end surface of the roller that rolls into contact with one running surface of the rail is located at an axial height position between one axial end surface and the other axial end surface of the roller that rolls into contact with the other running surface, and one of the rails The other axial end surface of the roller that rolls into contact with the other running surface is located at an axial height position that is out of the range between the one axial end surface and the other axial end surface of the roller that rolls into contact with the other running surface.

<Function> Therefore, in the present invention, since the plurality of rollers provided on the carriage are in rolling contact with each running surface with a slight difference in level from each other, the rotational moment due to the load of the drafting head etc. is applied to each roller. too,
The running surface and the roller can maintain surface contact.

Further, since the first and second guide rollers are respectively attached to separate shafts, the thickness of the portion of the carriage connected to the rail can be reduced.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.

FIG. 2 is a plan view showing a state in which a drawing machine to which the present invention is applied is attached to a drawing board.

A horizontal rail 2 is arranged and fixed to the upper end edge 1A of the drawing board 1 via fixing means such as a vise (not shown). A horizontal carriage 3 is disposed within this horizontal rail 2. This carriage 3 is attached to the horizontal rail 2 above.
The vertical rail 4 connected to the carriage 3 can be freely moved in the horizontal direction (in the left-right direction in FIG. 2) on the drawing board 1. The vertical rail 4 has a vertical carriage 5.
is installed. A drafting head 6 is connected to the carriage 5. By running the carriage 5 along the vertical rail 4, the drawing head 6 can be freely moved on the drawing board 1.

In this way, the drawing head 6 can be moved to any position on the drawing board 1.

Next, the traveling device provided between the drafting head 6 and the vertical rail 4 will be explained in detail.

As shown in FIG. 3, the carriage 5 has four ball bearing type rollers 7, 8, 9, 1.
0 is rotatably supported. As shown in FIG. 4, these rollers 7, 8, 9, and 10 are in rolling contact with running surfaces 25 and 26 formed in the vertical rail 4, respectively, and support the carriage 5 in a movable manner. Therefore, the drafting head 6 can be moved.

Since the rollers 7, 8 and 9, 10 have the same structure, only one of the rollers 9, 10 will be explained, and the explanation of the other roller 7, 8 will be omitted.

As is clear from FIG. 5, the chassis 15 of the carriage 5, on which the rollers 9 and 10 are arranged, has a first horizontal portion 15A and a first horizontal portion 15A.
A second horizontal portion 15B, which is bent into a crank shape and positioned above 5A, is connected to the second horizontal portion 15B.

The roller 10 is rotatably supported on the first horizontal portion 15A from the upper side with a screw 14 as an axis.

Further, a pivot arm 17 for supporting the roller 9 is provided above the second horizontal portion 15B. This pivot arm 17 has one end connected to a screw 1.
8 to the second horizontal portion 15B, and a screw hole 19 is formed at the other end. This screw hole 19 has the second horizontal portion 15B.
A fixing screw 21 is screwed from below through a long hole 20 formed in this horizontal portion 15B.
The pivot arm 17 is fixed to the chassis 15 by firmly tightening the fixing screw 21, and by loosening the fixing screw 21, the pivot arm 17 can be fixed to the chassis 15 within the longitudinal width of the elongated hole 20. It is designed to be able to pivot freely about the screw 18.

The screw 14 of the roller 9 is connected to the second horizontal portion 1
5B, and is screwed into a screw hole 24 formed in the middle of the pivot arm 17, so that the roller 9 can be inserted from the lower side of the second horizontal part 15B. It is fixed to the pivot arm 17. Therefore, by pivoting the pivot arm 17, this roller 9 can move within the range of the longitudinal width of the elongated hole 23, and by fixing the pivot arm 17, It is designed to be held in place.

In this way, each of the rollers 9 and 10 is rotatably supported by the chassis 15 of the carriage 5.

Further, the rollers 9 and 10 are arranged at heights such that there is a step l between them in the axial direction. That is, one axial end surface 9a of the one roller 9 is located at a height in the axial direction between the one axial end surface 10a and the other axial end surface 10b of the other roller 10, and The end surface 9b is pivotally supported so as to be located at a height in the axial direction away from between the one axial end surface 10a and the other axial end surface 10b of the roller 10.

Therefore, since each of the rollers 9 and 10 is provided with a step l in the axial direction, the carriage 5 is attached to each of these rollers 9 and 10.
Even if a rotational moment is applied due to a load such as that, and a local compressive force is applied to the rolling contact surface of each of the rollers 9, 10 with the running surfaces 25, 26, the rollers 9, 10 do not As much as it has l,
The compressive force is received by the entire contact surface. Therefore, there is no local distortion in the rollers 9, 10, and the rollers 9, 10
Since surface contact can be maintained between the rollers 9, 26 and the running surfaces 25, 26,
10 or the running surfaces 25, 26 can be prevented from being locally worn.

Next, a procedure for supporting the carriage 5 by rolling the rollers 9 and 10 onto the running surfaces 25 and 26 will be explained.

First, the roller 10 on the fixed side is brought into pressure contact with one of the running surfaces 26. Then, the movable roller 9 is brought into pressure contact with the other running surface 25 by loosening the fixing screw 21, and then the fixing screw 21 is tightened to fix the roller 9. In this way,
The rollers 9 and 10 are brought into pressure contact with the running surfaces 25 and 26 to support the carriage 5 in a movable manner. The drawing head 6 connected to the carriage 5 can be moved along the vertical rail 4.

In this way, in this embodiment, wear occurring between the rollers 9, 10 and the running surfaces 25, 26 can be prevented, so that the carriage 5 and drafting head 6 can run accurately and smoothly. can be maintained. In addition, each of the above rollers 9, 1
Since the step l of 0 is formed within the range of the axial thickness of each of these rollers 9 and 10, the space for disposing the traveling device within the rail 4 does not become extremely large. Therefore, it is possible to leave a design margin in the rail 4 for arranging and accommodating, for example, a running path for a balance weight.

Moreover, since the running surfaces 25 and 26 do not need to be formed at positions that are far apart, highly accurate parallel surfaces can be obtained relatively easily.

Further, since each of the rollers 9 and 10 is supported by a separate shaft, even when the rollers 9 and 10 are brought into rolling contact with the running surfaces 25 and 26, the running surfaces 25 and 26 , 26, it is possible to adjust the degree of contact of each of the rollers 9, 10 with the running surfaces 25, 26. Therefore, each of the rollers 9 and 10 is connected to the running surface 2.
5, 26 or the respective running surfaces 25, 26 without being affected by the delicate precision of the chassis 5, etc.
It is possible to make an appropriate transition contact.

Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, components having the same structure as those in the previous embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the movable roller 9 is connected to the eccentric shaft 2.
7, which is rotatably supported.

The eccentric shaft 27 has a first shaft 28 on which the roller 9 is provided, and a second shaft 29 that is eccentric to the first shaft 28. The second shaft 29 is formed into a male screw shape, and is screwed into a screw hole 30 formed in the first horizontal portion 15A of the chassis 15 from above the horizontal portion 15A. A nut 31 is screwed into the first shaft 29 at a portion protruding from the screw hole 30 of the second horizontal portion 15A.

By rotating the second shaft 29 from below the chassis 15 with a driver or the like, and rotating the roller 9 around this shaft 29, it is possible to press the running surface 26, and also to make this pressure contact. By tightening the nut 31 while maintaining this condition, the roller 9 is brought into rolling contact with the running surface 26 with an appropriate pressure. In this manner, also in this embodiment, the rollers 9 and 10 can be provided with a step so that they can be brought into rolling contact with the running surfaces 25 and 26, respectively. Moreover, in this embodiment, the roller 9 can be rotated simply by rotating the second shaft 29.
This adjustment is extremely simple since it can be brought into pressure contact with the running surface 26.

In each of the above embodiments, a traveling device disposed between the vertical rail 4 and the drafting head 6 has been described, but a similar traveling device may also be disposed between the horizontal rail 2 and the vertical rail 4. It goes without saying that it can be done.

Further, the traveling device of the present invention is not limited to being used for traveling the above-mentioned carriages and drafting heads, but can be widely applied to, for example, traveling for balance weights and the like.

<Effects of the Invention> As is clear from the description of the embodiments described above, according to the traveling device of the present invention, the plurality of rollers provided on the carriage come into rolling contact with each traveling surface with a slight difference in level from each other. Even if a rotational moment is applied to each of these rollers due to the load of a drafting head, etc., the running surface and the rollers can maintain surface contact, so there is no local wear on the running surface and rollers. will not occur. Therefore, it is possible to ensure accurate and smooth movement of moving members such as the drafting head, and
This traveling device is highly durable. Also,
Since the height difference between the rollers is within a relatively small range, there is no need to take up an extremely large space for the traveling device within the rail. Therefore, the degree of freedom in designing the rail can be increased. Moreover, since the running surface facing each of the rollers may be formed within a relatively narrow range of the rail, it is also easy to improve the accuracy of this running surface. Therefore, manufacturing of the above-mentioned rail becomes easy.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of essential parts showing a conventional example of a traveling device of a drawing machine, Fig. 2 is a schematic plan view showing a drawing machine to which the present invention is applied, and Fig. 3 is a diagram of a carriage in an embodiment of the present invention. Fig. 4 is an enlarged plan view showing the outline, Fig. 4 is an enlarged longitudinal sectional view showing the traveling device, and Fig. 5 is the above-mentioned Fig. 3.
FIG. 6 is an enlarged longitudinal sectional view showing another embodiment of the present invention. 2...Horizontal rail, 3...Horizontal carriage, 4...
Vertical rail, 5... Vertical carriage, 6... Drafting head, 7, 8, 9, 10... Roller, 9a, 10a
... One axial end surface of the roller, 9b, 10b... The other axial end surface of the roller, 25, 26... Running surface.

Claims (1)

[Claims for Utility Model Registration] A carriage disposed within a rail, and a plurality of guide rollers that are rotatably supported by the carriage and independently roll into contact with the mutually opposing running surfaces of the rail. , the carriage includes a first horizontal surface and a second horizontal surface bent into a crank shape, and the guide roller includes a first horizontal surface rotatably supported on the surface side of the first horizontal portion. At least one pair of guide rollers and a second guide roller rotatably supported on the back side of the second horizontal portion are provided, and one of the pair of first and second guide rollers is arranged in a radial direction. One axial end surface of the roller that contacts one running surface of the rail is in contact with the other axial end surface of the roller that rolls into contact with the other running surface, and the other is fixed so that it is movable and the other is immovable in the radial direction. The other axial end surface of the roller, which is located at an axial height between the end surfaces and is in rolling contact with one running surface of the rail, is located between the one axial end surface and the other axial end surface of the roller that is in rolling contact with the other running surface. A traveling device for a drafting machine that is supported so as to be located at a different axial height position.